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DS/CDMA Multiuser Detectors Based on Subspace Methods

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Author(s): Jaime Laelson Jacob | Taufik Abrão | Paul Jean Etienne Jeszensky

Journal: Semina : Ciências Exatas e Tecnológicas
ISSN 1676-5451

Volume: 27;
Issue: 1;
Start page: 79;
Date: 2006;
Original page

Keywords: Blind and Group-Blind Detection | Multiuser Detection | DS/CDMA | Orthogonal Vectors

ABSTRACT
In this work blind and group-blind (Bld-MuD and SBld-MuD, respectively) multiuser detectors (MuD) are analyzed from the point of view of the trade-off between performance versus complexity; specifically, the blind and group-blind detectors are characterized based on the direct inversion of correlation matrix (DMI), the minimum mean square error (MMSE) and hybrid SBld-MuD in the forms I and II. Monte Carlo simulations (MCS) were carried out in order to prove analytical performance, being evidenced the superiority of SBld-MuD detectors. The contribution of this work consists of the compared analysis of the performance degradation for the three detectors, considering errors in the estimates of the channel and system parameters. MCS results indicated the superiority of the detector Hybrid SBld-MuD I, considering errors in the carrier phase and channel coefficients (module and phase) estimates.
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